ARRAYS :

Array is a collection of similar type of data .

int arr[10]; 

Different ways of initializing arrays : 

1 : Initializing all specified memory locations 

2 : Partial array initialization. 

3 : Initialization without size.

 4 : String initialization. 

1 : Initializing all specified memory locations : If the number of values to be initialized is equal to size of array. Arrays can be initialized at the time of declaration. Array elements can be initialized with data items of type int,float,char, etc. 

2 : Partial Array Initilization : partial array initialization is possible in C language. If the number of values to be initialized is less than the size of the array, then the elements are initialized in the order from 0th location. The remaining locations will be initialized to zero automatically. 

You can access elements of an array by indices/index. You can use array subscript (or index) to access any element stored in array. Subscript starts with 0, which means array_name[0] would be used to access first element in an array. In general array_name[n-1] can be used to access nth element of an array. where n is any integer number.